{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "2aa0cc53",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "a\n",
      "['Alex', 583495, 25]\n",
      "(['Yangqian', 123435, 19], ['Jack,463434,23'], ['Alex', 583495, 25])\n",
      "(['Yangqian', 123435, 19], ['Jack,463434,23'], ['Alex', 583495, 25])\n",
      "['Alex', 583495, 25]\n",
      "(['Jack,463434,23'], ['Alex', 583495, 25])\n",
      "()\n",
      "(['Jack,463434,23'], ['Alex', 583495, 25], ['Mary', 438294, 27])\n",
      "(['Yangqian', 123435, 19], ['Jack,463434,23'], ['Alex', 583495, 25], ['Mary', 438294, 27])\n",
      "[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n",
      "[0, 2, 4]\n"
     ]
    }
   ],
   "source": [
    "# squares = [1, 4, 9, 16, 25]\n",
    "# squares.方法()\n",
    "\n",
    "user_data = \"Yangqian||yg||YY||QQ\"\n",
    "print(user_data[1])\n",
    "\n",
    "# 引入列表\n",
    "user_data_list = [\"Yangqian\",123435,19],[\"Jack,463434,23\"],[\"Alex\",583495,25],[\"Mary\",438294,27]\n",
    "\n",
    "# password_list = [123435,463434,583495,438294]\n",
    "# age = [19,23,25,27]\n",
    "# 1. 从左往右取值（index & slice）\n",
    "\n",
    "print(user_data_list[2])\n",
    "\n",
    "# 切片 slice ，右边的值取不到 例如[0:3] 索引为3的值取不到\n",
    "\n",
    "print(user_data_list[0:3])\n",
    "\n",
    "# 当从0开始取值时，0 可以忽略不写\n",
    "\n",
    "print(user_data_list[:3])\n",
    "\n",
    "# -3，-2，-1，0，1，2，3，4..\n",
    "# 2. 从右往左取值(index & slice)\n",
    "\n",
    "print(user_data_list[-2])\n",
    "\n",
    "# 切片 slice ，右边的值取不到 例如[-3:-1] 索引为-1的值取不到\n",
    "print(user_data_list[-3:-1])\n",
    "\n",
    "# 如果取值为空：说明slice写错了 例如[-3:0]\n",
    "\n",
    "# 如果要取到最后一个值，不能写0，直接省略不写\n",
    "\n",
    "print(user_data_list[-3:0])\n",
    "\n",
    "print(user_data_list[-3:])\n",
    "\n",
    "print(user_data_list[:])\n",
    "\n",
    "# 步长，list列表slice ：[start:stop:step]\n",
    "\n",
    "'''\n",
    "如果没有指定开始值，则默认为0；\n",
    "如果没有指定结束指，则取列表允许的最大值；\n",
    "如果没有指定步长值，则默认步长为1.\n",
    "'''\n",
    "\n",
    "num = list(range(10))\n",
    "print(num)\n",
    "print(num[0:6:2])\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "35b24448",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "name: yangqian\n",
      "age: 21\n",
      "job: student\n",
      "salary: 0\n",
      "-----------INFO yangqian----------\n",
      "name:yangqian\n",
      "age:21\n",
      "job:student\n",
      "salary:0\n",
      "-----------INFO yangqian----------\n",
      "name:yangqian\n",
      "age:21\n",
      "job:student\n",
      "salary:0\n",
      "-----------INFO yangqian----------\n",
      "name:yangqian\n",
      "age:21\n",
      "job:student\n",
      "salary:0\n",
      "https://www.nfu.edu.cn/ztb/index1.htm\n"
     ]
    }
   ],
   "source": [
    "# 用户输入和格式化打印\n",
    "\n",
    "name = input(\"name: \")\n",
    "age = input(\"age: \")\n",
    "job = input(\"job: \")\n",
    "salary = input(\"salary: \")\n",
    "\n",
    "# name 动态的出现在字符串中,字符串的拼接 用 \"+\" 符号来拼接\n",
    "info = '''-----------INFO '''+ name+ '''----------\n",
    "name:'''+name+'''\n",
    "age:'''+age+'''\n",
    "job:'''+job+'''\n",
    "salary:'''+salary\n",
    "\n",
    "print(info)\n",
    "\n",
    "# 优化字符串拼接 ： 占位符 %s 动态的数据-->变量\n",
    "# 优势：1.全部都写在一个大的字符串里面了\n",
    "#      2.省略了 “+”符号\n",
    "# 缺点？ 如果有几百个需要填进去的内容？容易顺序乱掉！出现打印结果的不正确\n",
    "\n",
    "info_占位符 = '''-----------INFO %s----------\n",
    "name:%s\n",
    "age:%s\n",
    "job:%s\n",
    "salary:%s''' %(name,name,age,job,salary)\n",
    "\n",
    "print(info_占位符)\n",
    "\n",
    "# 优化： .format() 格式化 字符串\n",
    "\n",
    "info_format = '''-----------INFO {姓名}----------\n",
    "name:{姓名}\n",
    "age:{年龄}\n",
    "job:{工作}\n",
    "salary:{薪水}'''.format(年龄=age,姓名=name,工作=job,薪水=salary)\n",
    "\n",
    "print(info_format)\n",
    "\n",
    "# .format()案例\n",
    "\n",
    "url = \"https://www.nfu.edu.cn/\"  #官网的域名\n",
    "# 目标获取高教动态的所有url链接\n",
    "高教动态 = \"gjdt\"\n",
    "url_页面 = \".htm\"\n",
    "url_页面细节不变 = \"/index\"\n",
    "\n",
    "# for i in range(1,27):\n",
    "#     完整的高教动态所有页面url = url+高教动态+ url_页面细节不变 + str(i)+url_页面\n",
    "#     print(完整的高教动态所有页面url)\n",
    "\n",
    "for i in range(1,2):\n",
    "    完整的高教动态所有页面url = \"https://www.nfu.edu.cn/{新闻}/index{页码}.htm\".format(页码=str(i),新闻=\"ztb\")\n",
    "    print(完整的高教动态所有页面url)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3aed67be",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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   "display_name": "Python 3",
   "language": "python",
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